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Chapter 21-Birds. Class Aves- Birds ~8,700 species Forelimbs modified into wings Amniotic eggs (hard-shelled) Scaled feet and legs Strong, light-weight.
Little penguin chick growth
Penguins by Abby
African Penguin By: Molly M.. Physical Characteristics The African Penguin has shiny, waterproof feathers. There are about 70 feathers per square inch.
BIRD PARTS. These small white pouches on the intestine are called colic caeca Their function is to _________________. contain microorganisms to break.
Marine Reptiles, Birds, and Mammals. Vertebrates Vertebrates originated in the ocean 350 million years ago Vertebrates descended from bony fish Land dwelling.
Comparative Anatomy. Avian-Integument Keratin-needed to produce scales, feathers and beaks and claws. –Dermis very thin-slow to heal. –Best sites of.
Marine Birds (Subphylum Vertebrata; Class Aves) Birds evolved from reptiles (dinosaurs) approximately 150-200 million years ago during the Jurassic period.
4.3 Evolution and Adaptation. Evolution Long periods of time Millions of years Species change over time Due to genetic mutation of traits Mutations passed.
Emperor Penguins By: Mrs. Long’s 3 rd Grade Class.
